Delivery unit for a liquid additive, method for operating a delivery unit and motor vehicle having a delivery unit

摘要

A delivery unit for a liquid additive includes a first pump with a first suction port and a first pressure port, a second pump with a second suction port and a second pressure port, and a feed device. The feed device is connected to the first pressure port through a first line system and the first suction port is connected to a tank for the liquid additive through a second line system. The second pressure port is connected to the tank through a third line system and the second line system and the third line system are separated from one another. A method for operating a delivery unit and a motor vehicle having a delivery unit are also provided.

主权项

1. A delivery unit for a liquid additive, the delivery unit comprising:
first, second and third line systems; a first pump with a first suction port and a first pressure port; a second pump with a second suction port and a second pressure port; a feed device connected through said first line system to said first pressure port, said first line system connected through said second suction port to said second pump; a tank for the liquid additive; said first suction port connected through said second line system to said tank; said second pressure port connected through said third line system to said tank; and said second line system and said third line system being separated from one another, said first pump having a first electric drive and said second pump having a second electric drive.